London-based crypto currency Exmo suffered a distributed denial-of-service attack on last Monday, causing the platform’s servers to become unavailable.

In a tweet on Monday, Exmo reported that hackers had targeted the swap with $75 million in trading amount in a distributed denial-of-service, or DDoS attack. These cyber attacks usually excess a system with numerous requests from multiple virus-infected servers.

The attack comes two months following the crypto exchange reported that hackers had stolen $10.5 million in Bitcoin (BTC), Zcash (ZEC), Ether, XRP, Bitcoin Cash (BCH) and Tether (USDT). Executives later suggested some of the funds could not be recovered for the reason that the attackers had withdrawn $1 million in XRP and $2.8 million in ZEC through Poloniex.

According to records from CoinMarketCap, the whole volume on Exmo has fallen 4.9% in the last 24 hours. The event in December 2020 caused the exchange to lose about 5% from its total assets, though only hot wallets of Exmo’s were reportedly afflicted by the hack.

Maria Stankevich, leader business development officer of Exmo, told Cointelegraph that because in December 2020 breach, the exchange has implemented a number of measures to reduce the possibility of a future attack. She said Exmo transferred cryptocurrency withdrawals to the protection arm of hardware wallet manufacturer ledger and created a bug bounty program to test the exchange, among other solutions.

Since January 10, every crypto exchange in the United Kingdom is required to be registered with the country’s Financial Conduct Authority (FCA), which verifies they are in compliance with Anti-Money Laundering regulations. Though, a number of firms that have submitted applications, including Exmo, have received temporary registration from FCA allowing them to continue trading until July 9.